American Tower Corporation Announces Election of Grace D. Lieblein to Board of Directors

BOSTON--(Business Wire)--American Tower Corporation (NYSE: AMT) announced that its Board of
Directors has elected Grace D. Lieblein as a director.

Ms. Lieblein joined General Motors (GM) in 1978 and has held a variety
of leadership positions at GM in engineering, supply chain management
and international operations, including as Vice President, Global
Quality from 2014 to 2015, Vice President, Global Purchasing and Supply
Chain from 2012 to 2014, GM Brazil President from 2011 to 2012 and GM
Mexico President from 2008 to 2011. In addition, Ms. Lieblein is a
director of Southwest Airlines Co. and Honeywell International Inc.

“We are extremely pleased to welcome Grace Lieblein to our Board of
Directors,” said Jim Taiclet, Chairman, President and Chief Executive
Officer of American Tower. “Grace brings a wealth of global operational
and strategic experience, stemming from her tenure at GM, including a
deep knowledge of doing business in Latin America, where she led
operations in Brazil and Mexico. We believe that Grace will make a
tremendous contribution to our Board as we execute on our U.S. and
global growth strategy, innovation initiatives and operational
excellence programs.”

About American Tower

American Tower, one of the largest global REITs, is a leading
independent owner, operator and developer of multitenant communications
real estate with a portfolio of over 147,000 communications sites. For
more information about American Tower, please visit www.americantower.com.